Yes! When you click login, it brings you to the government website to login and provide your information. I never see any of that data.
I am a wee developer who got annoyed with the government's website and how many clicks it took to login and see if a appointment was available. If my site can help you at all, that's good enough for me.
Technically, you do not need an appointment. You can wait until you return from your international trip and go through the special Global Entry Appointment line at your US based airport.
This might be a better option for many, since even though get through customs in a matter of seconds, you still need to wait for your bag to get off the plane and to you. My last trip I waited 30+ minutes for my bad, giving my friends who had no Global Entry enough time to get to me and finish their snacks.
I honestly have no way to do that right now. So probably by email (andrew dot r dot pagan at gmail dot com) or even by LinkedIn would work.